Wire-stretching device.



' PATENTED FEB. 18, 1906.

W. BROAD.

WIRE STRETGHING DEVICE.

APPLICATION FILED MAY 23, 1905.

3 SHEETSSHEET 1.

ATTORNEY No. 812,401. PATENTED FEB. 13, 1906.

W. BROAD. WIRE STRETGHING DEVICE.

APPLICATION FILED MAY 23, 1905.

3 SHEETS-SHEET 2- I Q -III 5 WBTNESSESI BNVENTUR ATTORNEY No. 812,401. PATENTED FEB, 13, 1906.

W. BROAD. WIRE STRETUHING DEVICE.

APPLICATION FILED MAY 23, 1905.

3 SHEETS-SHEET 3.

EVEN FUR UNITED STATES PATENT @FFIQF.

WIRE-STRETOHING DEVICE.

Application filed May 23,

To all whom it may concern.-

Be it known that I, WILLIAM BROAD, a citizen of the United States, residing at Aliquippa, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Wire-Stretching Devices; and I do declare the following to be a full, clear, and exact description of the inven tion, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to a new, novel, and useful improvement in wire-stretching devices, and is particularly designed to be used in connection with electric-light wiring, where a pair of wires is essential.

The primary object of my invention is to provide a simple and inexpensive means for drawing the same taut, thus doing away with a helper, as is now necessary in the present mode of stretching a'pair of wires simultaneously.

In the accompanying drawings, in three sheets, I have shown a preferred and two modified forms of my invention.

Figure 1, Sheet 1, is a side view of a wire seated in the insulator-blocks and having my device in position thereon. Fig. 2 is a bottom plan view of the same, showing a pair of wires. Fig. 3 is a horizontal sectional view of the vise-head portion of my device, taken on line 3 3 of Fig. 2. Fig. 4 is a sectional view taken on line 4 4 of Fig. 3. Fig. 5, Sheet 2, shows a modified form of stretcher in position. Fig. 6 is a bottom plan view of the same. Fig. 7 is a sectional view of the visehead portion of my modified form of vise, taken on line 7 7 of Fig. 6. Fig. 8 is the pressure-blockportion ofmy device. Fig. 9 shows a second modified form of my device in position. Fig. 10 is a bottom plan view of the same. Fig. 11 is a sectional view of the visehead portion of my second modified form,be ing taken on line 11 11 of Fig. 11. Fig. 12 is a cross-sectional view taken on line 12 12 of Fig. 10.

Numerals of reference designate like parts throughout the several views, in which the numeral 1 represents ordinary insulatorblocks secured to a wall or ceiling, and 2 apair of wires supported by the same and fastened in the usual manner.

Specification of Letters Patent.

1905. Serial No. 261 743.

Patented Feb. 13, 1906.

an ordinary wing-nut on the outer end thereof. The screw-stem 3 passes through a visehead 4, the inner end being operatively mounted in a pressure block or head 5 and the latter adapted to engage against the insulator-block during the drawing or stretch ing process.

The vise-head 4 consists of two members, the lower one 4 having a cut-out portion adapted to fit over aboss 6, formed on the up- .per member. Inserted in the center of the boss 6 is a screw-stem 7, provided with a winged head 8. Formed in the upper and lower members of the vise-head, near the outer ends of each, are milled grooves 9, adapted to register with each other and serve as a seat for the wires 2 2.

In the operation of my device the pair of wires are first mounted in the insulatorblocks and pulled as tight as possible by hand. The first block is then screwed into position, one end of the wires. My device is then placed in position, as shown in Fig. 1, the pair of wires being laid in the grooves 9 9 and the pressure-block 5 bearing against the second insulator-block. The wires are next securely clamped in their seats by simply turning the thumb-nut 8, which operation forces the member 4: up on the boss 6 and draws the two sections into closer relation and by so doing clamps the wires tive seats. The milled face of the grooves acting as a gripping-surface on the wires in this position the process of drawing the wires taut can be carried out. By simply turning the left-screw stem 3 it will draw the vise-head 4 forward and at the same time pull the wires as taut as is necessary, in which position they can be held by screwing up the under insulator-block. The device is then removed by reversing the thumb-nut 8, thus loosening the grip on the wires, and the process of stretching be continued at the next insulatorblock.

In the following modified forms of my device I have made a change in the mode of constructing the vise-head portion without departing from the fundamental principle involved in my invention, the several changes being made to illustrate difierent methods of gripping the wires prior to the stretching process.

In the first modification (shown on Sheet 2 thus clamping and securely holding firmly in their respec-- 3 represents a 1eft-threaded screw having of the drawings) the vise-head section of my device consists of a main body portion 10, throu h which passes the operating leftthrea ed screw-stem 3. Hinged in any convenient manner to the under side of the portion 10 are a pair of clamping members 1 1 11, each one being independently regulated by a thumb-screw 12. Suitable registering milled grooves formed in the different members near each end afford a seat for the wires. The wires are released by simply reversing the thumb-screws 12 12.

v In the second modification (shown on Sheet 3 of the drawings) the vise-head consists of a body portion 13, in which are pivotally seated a pair of clamping-dogs 14 14. The leftthreaded screw stem 3 passes through a square tapered nut 15, which when the screw-stem is turned will be drawn forward, pulling the vise-head along with it, and at the same time by contact with the dogs 15 15 be forcing the latter tighter against the wires. In this form of device the Wires are released by reversing the screw-stern 3, thus causing the tapered nut to recede from its'seat in the vise-head and alsorelease the pressure on the clamping-dogs 14 14.

Having thus fully shown and described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a device of the character described, a vise-head formed in sections, one of said sections having an elongated hollow boss, the opening of the boss conforming to the contour of the boss, a second section having an elongated boss adapted to fit snugly Within the opening of the first-named section, said boss having a centrally-threaded recess, a screw member engaging the threads of the recess, said screw member being provided with a head bearing against the first-named section and a presser-head operatively connected to one of the sections.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM BROAD.

Witnesses:

P. W. STRAYER, JAMEs PIPERQ 

